Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5418df604f3237…

MALICIOUS

PDF

37.8 KB Created: 2020-08-26 19:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 08ce2cd6acaf0dd034759e15caf44e4c SHA-1: e85ba56d4b4fe009da3e05ca27ca2736133c94e3 SHA-256: 0a5418df604f32377c601e03fa788c6b7329ca734f159cf675d3976c27a77306
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to redirectors designed to obscure the final malicious destination. The document body, though heavily obfuscated, contains a URL that leads to a redirector, likely intended to trick users into downloading a malicious file under the guise of educational material. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=physics+douglas+c+giancoli+7th+editi In PDF document text
    • http://putofun.kilmantinarts.com/uploads/1/3/0/9/130969191/2326043.pdfIn PDF document text
    • http://files.koiknowledge.com/uploads/1/3/0/8/130874067/vofuveror.pdfIn PDF document text
    • http://files.olgasplaces.com/uploads/1/3/0/7/130775163/2afeaa1a897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/devumonaxidurilupafulawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2679/files/brittany_renner_judge_this_cover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6434/0130/files/my_talking_angela_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/nellly_furtado_all_good_things.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6150/1349/files/80514504975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/24544314554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8420/8545/files/bel_ami_livre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/zuzuposazorat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/inkscape_manual_free_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: olgasplaces.com 3 samples

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B5 5288 bytes
SHA-256: 929f74f10d6b8fb60f3c3c6adadcbc32c2b764172842486bc037353c07ac98f6
font_01_sfnt_off000067af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 10280 bytes
SHA-256: 402a2887daa8dc334ffb105db1845b854dd22f90bf5cf300396df52be40d6de3

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